Radioreceiver



June 10', TgllgZg M. s. FlNLr-:Y

RADIORECEIVER 'Led June G, 1922 v y @a 14 C0121 p1 imemspj".

A TToRNgY.

Patented June 10, 194. l

MAX S. FINLEY, OF XNDIANAPOLIS, INDIANA..

` RADIORECEIVER.

' Application filed .Tune 6,

To @ZZ 'whom t may concern.'

Be it known that I, MAX S. FINLEY, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of indiana, have invented certain new and useful Improvements in Radioreceivers, of whichthe following is a specification.'

l This invention has reference to radio rcbcivers, and its object is to provide an elfieient and yet extremely simpleand cheap receiver for the purpose.'

Certain of the terminals are utilized for an aerial and for 'the ground connections of the device and suitable others of the terminals receive the listening telephone.

The inventionV will be best Iunderstood from a consideration of the lfollowing detailed description taken in connection with the accompanying drawings forming partof this specification, withthe understanding that the invention is not confined to any strict conformity with the showing of the drawings, but may be changed and modified so iong as such changes and modifications niark no material departure from the salient features of the invention as expressed in the appended claims.v

In the drawings z- Figure 1 is a face-view of the radiore-l ceiver.

ll5" ig. 2 is a rear view of the radio receiver.

Fig. 3 is a rear view of the radio receiver with the back section in most part removed.

Fig. 4 is a section on the line ,1-4 of igure 5 is a dia ram of the connections.

Referring to the rawings, there is shown a body member 1 composed of. two'cardboard sheet-s 2 and 3,v respectively.

Between the sheets 2 and 3 there are located. two coils, a primary 4, and a secondary 5.

At certain points, the two sheets or plates 1922. Serial No. 566.230.

have passed therethrough fastening devices 6 6, 7, 8, 9 and 10 which may consist of ordinary paper fasteners, usually of brass, in the form of staples readily obtainable upon the market as well as being useful in most instances yas electrical conductors. As shown in the 4drawings each fastener has a head and legs, which legs may bespread apart to secure the frontand back sheets 2 and 3 together. A

Through one of the sheets, near its center, are passed two more fasteners 11 and 12 spaced as shown.

W'hile the first mentioned fasteners serve to secure the sheets together, they also serve as terminals for the coils, and bindin posts to which connections are made in setting up the device.

The primary coil' has' one end connected Ato fastener 7, and the other end to fastener 8, as shown, and in setting up the instrw.

, is connected to the aerial 13,-

ment fastener 7 and 8, is grounded. l

The secondary coil has one terminal at fastener 10, and the other at fastener'12, which fastener is passed through the sheet in opposite directionv to 11, and has its legs about a galena crystal 14, on .the outer surface of the sheet.

From fastener 9, a connection is run to and given a couple ofturns about1 1 and then through to the outer surface of the sheet, where its free end 15 provides a catwhislrer for locating the sensitive spot upon the surface of the crystal when tuning in the set.

-The headphones 17, are connected to fasteners 9 and 10.

For convenience in connecting up the` device, the surface vof the upper sheet hasl marked thereon, beside eachof the termimals, certainletters to indicate the proper connections to be made at the respective points. They are as follows, 'A at fastener A7, ,to indicate aerial connection, G- at fastener 8 to indicate ground connection, and T-T at 9 and 10, to indicate telephone connections. y f r As this device is not variable but tuned to receive a wave length of about 2560y meters,

it is very easily set up, it only being neoessary after the4 aerial, ground and' phone oonnections have been lmade, to locates. lsensitive spot uponthe crystal witht-he catwhisker, to receive signals.

With this device a simple,

, I! rial, Y

, tween the sheets,

`l0- manufactured part needed being the. aerial' andthe head hones. What is claimed is 1. In a radio receiver, a body member y composed of spaced'sheets ofinsulating maprimary and secondary wire coils and conducting termi# nals carried by the sheets and exposed with-` A 1,497,4ee

in and on one surface of the `body member,

said terminals being adapted to receive the aerial and groundl'wires,l and conductors for a receiving telephone. f v

2. In a radio receiver, two -sheets'of insu- -llating material, primary and secondary coils transformer and housed vone constituting a other between said insulatinterior to the ing sheets, metal staples or other metal fasteners, traversing and joining ythe sheets together, sheet and constituting terminals for the transformer, aerial and ground wires connected to the terminals.

i In testimony whereof, I affix my signatureY hereto.

AMAX S.

other metal staples traversing one 

